package com.loooooo.pm2024.utils;


import com.google.zxing.common.BitMatrix;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/*
  二维码的生成需要借助MatrixToImageWriter类，该类是由Google提供的，可以将该类直接拷贝到源码中使用，当然你也可以自己写个
  生产条形码的基类
 */
public class MatrixToImageWriter {
    private static final int BLACK = 0xFF000000;// 用于设置图案的颜色
    private static final int WHITE = 0xFFFFFFFF; // 用于背景色

    private MatrixToImageWriter() {
    }

    public static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, (matrix.get(x, y) ? BLACK : WHITE));
                // image.setRGB(x, y, (matrix.get(x, y) ? Color.YELLOW.getRGB() :
                // Color.CYAN.getRGB()));
            }
        }

        return image;
    }

    public static void write(BitMatrix matrix, String format, OutputStream file, InputStream logoStream)
            throws IOException {

        System.out.println("write to file");
        BufferedImage image = toBufferedImage(matrix);
        // 设置logo图标
        if (logoStream != null) {
            QRCodeFactory logoConfig = new QRCodeFactory();
            image = logoConfig.setMatrixLogo(image, logoStream);
        }
        if (!ImageIO.write(image, format, file)) {
            throw new IOException("Could not write an image of format " + format);
        }
    }


}
